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Subjects

Science

Nature and meaning of science

“Nature and Meaning of Science” introduces Class 9 students to science as a systematic way of exploring the natural world, rather than a collection of fixed facts. Within “Exploration: Entering the World of Secondary Science,” students examine how observation, questioning, evidence, measurement, reasoning, experimentation, and communication work together to build scientific knowledge. The topic also highlights curiosity, objectivity, creativity, responsible investigation, and how explanations change when new evidence emerges. It connects science with everyday experiences and prepares learners for inquiry-based study of later concepts.

Hard · Level 4 · 25 questions

Practice questions

01What type of evidence is most suitable for establishing cause and effect in a scientific study?

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02In a study two variables increase together but a third factor affects both. What is the third factor called?

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03Why is writing the hypothesis and analysis plan before an experiment useful?

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04An extraordinary conclusion is presented as a scientific claim. What would be required for such a claim?

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05Why is it useful for a scientific explanation to contain fewer unnecessary assumptions?

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06A study shows a statistically different result but its effect in daily life is negligible. What else should be considered?

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07If a scientist removes an unusual result without explanation what is the main ethical problem?

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08What is a benefit of sharing raw data in a scientific report?

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09Why is scientific criticism considered a tool for progress?

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10A claim produces changing results but the researcher changes its explanation after every result. What is the main problem?

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11In an experiment the difference between two levels of the independent variable is very small. What difficulty may arise?

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12In a study people taking a medicine reported feeling better but there was no control group. What caution is necessary in the conclusion?

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13What is the importance of a failed hypothesis in the development of scientific knowledge?

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14Why is it useful to state confidence or uncertainty with a scientific conclusion?

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15Obtaining participants' consent in a scientific study is related to which principle?

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16Two explanations account for the same data about a natural phenomenon. What would be a better scientific test?

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17Why does an unclear method make a study result difficult to verify?

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18What is the most important difference between a scientific prediction and an ordinary guess?

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19A researcher selects only sources supporting a claim and ignores opposing studies. What does this show?

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20What is the external validity of a scientific conclusion related to?

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21Why is knowledge construction in science more of a collective process than an individual achievement?

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22What does revising a scientific model after new evidence appear demonstrate?

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23A study reports benefits but gives no information about possible harms. What is the most appropriate scientific evaluation?

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24Which statement most broadly expresses the nature of science?

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25A scientific study provides data supporting its results but does not describe the measurement method. Why does this weaken verification of the claim?

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